If you keep confidential or particularly important documents on your computer, and fear that something might happen to them (that they may be lost, or that someone can access them), you should use an application like this: Dekart Private Disk.
Thanks to Dekart Private Disk you can create virtual storage units, completely secure, and in unlimited number. These units will appear in the system as one more hard disk (with a letter assigned like the rest), but they will also be encrypted with an algorithm. Its content can only be known by applying a password. The program is simple to use, putting the security and convenience of an encrypted virtual drive within the reach of any type of user.
You can free download Dekart Private Disk (English) 32, 64 bit and safe install the latest trial or new full version for Windows 10 from the official site.